Gage-cock.



THOMAS WATKINS, OF PHILADELPHIA7 PENNSYLVANIA.

GAGE-COCK.

Specification of Letters Patent.

Patented July 21, 1908.

Application filed August 22, 1907. Serial 110,889,665.

To all whom it may concern:

Be it known that I, THOMAS WATKINS, acitizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented a certain new and useful Improvement. inGage-'Cocks and the Like, 'of which the following is-a specifica-Vamount thereof to escape as is usual, and' which will also permittheremoval of the gage cock iproper while preventing the escape of steamthe repair of the valve or other parts o the device Without thenecessity of emptying the boiler of steam or Water.

l/Vith these ends in view, this invention' consists of the details of.construction and combination of elements hereinafter set forth and thenspecifically designated by the claims. i

In order `that those skilled in the'art to which this inventionappertains may understand how to make and use the same, I will describe"its construction in detail, referring by letter to the accompanyingdrawin formino' a part of thisl speci cation, in Whic 4 igure 1 is alongitudinal section of my imrovement. Fig. 2, a section at. the line *Yof Fig. 1. Fig. 3, a section at the line X--X of 1.

In carrying out my invention as here embodied, I provide a nip le Awhich is referably tapered havingt ethreads'B.A ormed thereon bywhich itis adapted to be screwed through the wall of the boiler. This nipple hasa central opening @which communicates with the interior of the boilerand leads to the1 recess D, a portion of which is threaded as indicatedat E for the reception of. the inner end of the valve plu@r F.

G represents the body of the'gage cock Which'is threaded to the outerend of the valve lug and has a central opening I formed theret `ou h' inwhich is fitted the valve stem J, sai stem having formed thereon the omthe boiler thus providin forposition by the spring M which is coiledaround the valve stemex'tension J. The inner end of the valve plug has'formed thereon the valve'seat O, an P is a secondary valve adaptedtoiclose upon this seat and guided in place by -the stem P The'ou'terendof the body is threaded. as indicated -at Q for Ithe reception of thegland nut It which is .adapted to force the sleeve S against the packingS"` and thus prevent the escape of steam around the stem J.

' T represents the hand lever which is pivoted at T to a suitable'bracket T2, 'said bracket being either cast with the body or arranged tobe clamped thereto as may best suit therequirements of the particularwork the device is intended for.

From the foregoing description the o era,- tion of my improvement willbe obvious y as follows The valve stem extension J being of suflicientlength to abut against the valve stem P the valve P Will be normallyheld 0E its seat thus permitting the free flow of steam through thenipple and valve plug to the valve L, and as the latter is normally heldclosed by the s ring M no steam can pass this last named va ve until itis forced off of its seat, the latter being accomplished by forcing thehand lever inward against the valve stem J thus opening the valve K andermitting the steam to iiow into the opening from whence it will issuethrough the outlet U. Upon the release of the hand lever the spring Mtogether with the pressure of the steam will close the valve K and cutod the further flow of the steam or water. Should it become necessary toremove the age cock for repair such as regrinding the va ve K and itsseat L or for other purposes the screwing off of the body from the valveplug will carry the valve stem extension J out of contact with the valvestem P thus permitting the valve P to be forced against its seat by thesteam pressure Where it will be held thus preventing the outflow of thesteamor Water, and when the gage cock has been re aired and replaced theva ve P will again be orced olf its seat and so held again permittingthe steam or Water to iiow to the valve K. .In practice this is of greatadvantage since it avoids the-liability of injury to the attendant andermits the Wh' e I have ere shown a portion of the valve stemJ and thevalve stem P of triengular shape in cross section i; is obvious thatthey may be of any desired shaV it is obvious that the Valve K may heorovided with e fiber Washer for seating upon the valve seat L.

Hai/'ing thus fully described my invention, what i ehtirn as new anduseful, is l A. gege oook composed of a three part ees ff', first acentral portion having a here Jrethnmgh and reduced exteriorly threadede forming opposite shoulders, second e ele having one end exteriorlythreaded its op osito end threaded onto one of d ends ot the centralportion and abutting ne of said shoulders thereof7 and third a bodythreaded at one end onto the other end of said central portion andabutting the other shoulder thereof said @entrai portion being?)e formedvvith a, votive seat et one end thereot, seid body' being formed with eVewe seat intermediate its ende, end a, "waive 'for each of seid seats,t stein on each valve heffing their inner ende o rit/ting, ineens foroperating seid stein in tl body, end e eoii spring engaging the'vir-ive' 'body at one end and et oppoete end sdoutting the opposite endof Said e t ai portion.

, molly whereof, have hereunto fixed my signature in the presence oi'twesubseribing Witnesses.

THOMAS /Vi Vvitnessee S. M. GALLAGHER, l. WEISMML

